NSFR is the no system files replacement version, meaning it's just the msstyles and is made to work with the default shell32 and explorerframes in 7. Later I'll make the changes to support the full version, I'm just using NSFR at the moment to test everything without having to constantly upload the dll files (takes about 30 minutes on my connection).

I want to make a bug report, I don't know if it has already been posted.

The Taskbar with small icons has inconstistent look, the image behind the Start-Button and the System-Tray looks different than the one behind the task-switcher. I want to mention it, as it looks ugly.

It's size and borders are there simply because they were in Longhorn and the point of this theme is to get it as close as possible to the actual Aero theme from back in 2004 (while also making it look more modern and clean). But I understand what you're saying, if this wasn't a recreation the buttons would be larger and it wouldn't have had a double border.

Yes, it was like that throughout all of Longhorn including Vista when it released. It was made because if you look at a real pane of glass the edges will be teal due to the way the light goes through it.

YAY. I also got fed up with Windows 8 and decided to switch back to windows 7. But I needed the good theme I used beforeI upgrade to Windows 8. I'm counting on you now to see when I should return back to Windows 7